Single lumen catheter



FIG. 1 is a perspective view of a single lumen catheter showing our new design;

FIG. 2 is a front end elevational view thereof;

FIG. 3 is a rear end elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a side elevational view thereof; and,

FIG. 6 is a bottom plan view thereof, the other side being a mirror image. 

The ornamental design of a single lumen catheter, as shown and described. 